If rain destroys your phone that is just plain incompetence from the design department. Or rather, they were not incompetent, but other forces made sure they were not paying much attention to water resistance.
My wettest experience with a smartphone was when I got surprised by heavy rain when walking to the hair dresser. I arrived soaking wet. Got the phone (a HTC Desire Z) out of my pocket, water was running out of it. I opened the battery lid, the hairdresser blew with the hairdryer for a couple of minutes and all was fine.